With more than 50 years of experience, Coragulac Quarries is a trusted local supplier of high-grade basalt, scoria, and volcanic tuff products. Located near Colac, we supply durable and affordable quarry materials for residential, commercial, agricultural, and industrial projects throughout Victoria.

Crushed Rock – Durable Basalt for Every Application

Crushed rock is one of the most reliable and versatile building materials. Our premium basalt rock provides excellent compaction and drainage, making it ideal for a wide range of construction and landscaping uses.

Common Uses

• Driveways and access roads
• Road construction and repair
• Garden paths, walkways, and patios
• Concrete or paving base
• Gabion baskets and retaining walls

Crushed Basalt Products

• Crusher Dust
• 20mm Crushed Rock
• 40mm Crushed Rock
• 75mm Crushed Rock
• Beaching Rocks
• Basalt Spalls

Drainage Rock & Aggregates – Sustainable, Cost-Effective & Reliable

We supply premium drainage rock and aggregates to customers across Colac, Geelong, Ballarat, and Melbourne. Our materials are ideal for drainage systems, erosion control, landscaping, and construction, offering a sustainable alternative to newly quarried rock.

Why Choose Our Aggregates

• Available in a variety of sizes
• Produced using recycled crushed rock
• Cost-effective and environmentally conscious
• Backed by expert local service

Applications

• Garden and landscape drainage
• Backfilling retaining walls
• Erosion control and water-sealing foundations
• Pipe bedding and trench fill
• Decorative landscaping

Available Sizes

• 7mm Drainage Rock
• 20mm Drainage Rock
• 40mm Drainage Rock

Our experienced team can help you select the right aggregate for your project. We offer fast delivery and competitive pricing across regional Victoria.

Scoria Rock – Lightweight, Striking & Versatile

Scoria is a dark volcanic rock recognised for its red, purple, and brown tones. Lightweight yet durable, scoria is perfect for both decorative and structural uses.

Benefits

• Excellent drainage and filtration
• Lightweight and easy to work with
• Distinct natural colours for landscaping

Common Uses

• Driveways, laneways, and farm tracks
• Garden beds and retaining wall backfill
• Decorative garden features
• Concrete aggregate, pipe bedding, and barbecue stones
• High-temperature applications

Scoria Products

• Raw Scoria
• 5mm Minus Scoria
• 10mm Minus Scoria
• 20mm Minus Scoria
• Scoria Rubble

Volcanic Tuff (Wombat) – Colac’s Iconic Building Stone

Known locally as Wombat, volcanic tuff is a compacted volcanic material formed from ancient eruptions around the Colac region. Softer than scoria and easy to shape, it’s ideal for driveways, garden walls, and landscape sculptures.

Characteristics

• Softer texture for shaping and building
• Natural weathered look
• Locally sourced from the rim of an extinct volcano

Common Uses

• Driveway gravel and pathway surfacing
• Building stones and garden walls
• Decorative rockwork and sculptures

Volcanic Tuff Products

• Raw Wombat
• 5mm Minus Wombat
• 10mm Minus Wombat
• 20mm Minus Wombat
• 50mm Minus Wombat
• 100mm Minus Wombat
• 50mm Rubble
• 100mm Rubble

We also provide contract screening services to achieve specific size and grading requirements for your project.

Why Choose Coragulac Quarries

• Consistent product quality
• Reliable supply and fast delivery
• Sustainable sourcing
• Competitive pricing
• Friendly, knowledgeable service